"Believe you can and you're halfway there." Theodore Roosevelt
I think this quote means that if you keep working hard that you can succeed on that goal. I apply this to my life by working hard and never stop believing in myself and to never give up. I think that this quote can change a persons attitude cause if they think that this quote means to work hard and you we have your goal soon then if they believe in this quote then they will soon achieve their goal. It would make an impact on the world by having everyone work hard and almost everyone will almost achieve their goal.